1 ; Test moves between FPRs and GPRs for z196 and above.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
5 ; Check that moves from i32s to floats can use high registers.
6 define float @f1(i16 *%ptr) {
8 ; CHECK: llhh [[REG:%r[0-5]]], 0(%r2)
9 ; CHECK: oihh [[REG]], 16256
10 ; CHECK: ldgr %f0, [[REG]]
12 %base = load i16 *%ptr
13 %ext = zext i16 %base to i32
14 %full = or i32 %ext, 1065353216
15 %res = bitcast i32 %full to float
19 ; Check that moves from floats to i32s can use high registers.
20 ; This "store the low byte" technique is used by llvmpipe, for example.
21 define void @f2(float %val, i8 *%ptr) {
23 ; CHECK: lgdr [[REG:%r[0-5]]], %f0
24 ; CHECK: stch [[REG]], 0(%r2)
26 %res = bitcast float %val to i32
27 %trunc = trunc i32 %res to i8
28 store i8 %trunc, i8 *%ptr
32 ; Like f2, but with a conditional store.
33 define void @f3(float %val, i8 *%ptr, i32 %which) {
35 ; CHECK: cijlh %r3, 0,
36 ; CHECK: lgdr [[REG:%r[0-5]]], %f0
37 ; CHECK: stch [[REG]], 0(%r2)
39 %int = bitcast float %val to i32
40 %trunc = trunc i32 %int to i8
42 %cmp = icmp eq i32 %which, 0
43 %res = select i1 %cmp, i8 %trunc, i8 %old
44 store i8 %res, i8 *%ptr
48 ; ...and again with 16-bit memory.
49 define void @f4(float %val, i16 *%ptr, i32 %which) {
51 ; CHECK: cijlh %r3, 0,
52 ; CHECK: lgdr [[REG:%r[0-5]]], %f0
53 ; CHECK: sthh [[REG]], 0(%r2)
55 %int = bitcast float %val to i32
56 %trunc = trunc i32 %int to i16
58 %cmp = icmp eq i32 %which, 0
59 %res = select i1 %cmp, i16 %trunc, i16 %old
60 store i16 %res, i16 *%ptr